2. PTM Levels in Forced Degradation Samples.
| Average ± SD | M254 Oxidation, % | M360 Oxidation, % | N386 Deamidation, % | N386 NH3 loss, % | N392 NH3 loss, % | M399 Oxidation, % | N152 NH3 loss, % | N158 Deamidation, % | |
|---|---|---|---|---|---|---|---|---|---|
| mAb | Non stressed | 4.64 ± 14.40 | 0.60 ± 1.94 | 0.72 ± 0.40 | 0.32 ± 0.05 | 0.75 ± 0.09 | 0.51 ± 0.04 | 0.00 ± 0.00 | 1.87 ± 3.22 |
| Heat stressed | 7.47 ± 0.57 | 1.00 ± 0.03 | 1.74 ± 0.72 | 0.42 ± 0.02 | 0.81 ± 0.03 | 3.85 ± 0.29 | 0.02 ± 0.00 | 3.21 ± 0.17 | |
| Photo stressed | 27.00 ± 8.52 | 4.11 ± 1.00 | 0.86 ± 0.45 | 0.35 ± 0.04 | 0.82 ± 0.07 | 0.57 ± 0.03 | 0.00 ± 0.00 | 7.43 ± 0.46 | |
| UPBH | Non stressed | 3.75 ± 0.13 | 0.66 ± 0.06 | 1.23 ± 0.33 | 0.98 ± 0.07 | 0.34 ± 0.04 | 1.81 ± 0.27 | 0.05 ± 0.01 | 0.26 ± 0.04 |
| Heat stress | 44.58 ± 0.52 | 11.41 ± 0.68 | 24.83 ± 17.75 | 0.83 ± 0.30 | 0.65 ± 0.27 | 22.80 ± 0.80 | 0.05 ± 0.01 | 2.32 ± 0.30 | |
| Photo stressed | 95.88 ± 0.33 | 58.93 ± 0.43 | 7.60 ± 9.98 | 0.99 ± 0.17 | 0.50 ± 0.17 | 58.79 ± 1.04 | 0.06 ± 0.00 | 0.36 ± 0.11 | |
| UPBH (Buffer exchanged) | Non stressed | 5.84 ± 0.14 | 0.87 ± 0.04 | 2.32 ± 2.13 | 0.88 ± 0.06 | 0.29 ± 0.03 | 2.48 ± 0.79 | 0.03 ± 0.01 | 0.25 ± 0.05 |
| Heat stress | 40.76 ± 1.92 | 7.55 ± 0.70 | 18.42 ± 23.84 | 2.39 ± 1.42 | 0.32 ± 0.14 | 21.39 ± 24.16 | 0.04 ± 0.01 | 0.37 ± 0.04 | |
| Photo stressed | 97.12 ± 0.61 | 70.69 ± 0.45 | 1.20 ± 0.83 | 0.89 ± 0.15 | 0.43 ± 0.09 | 77.22 ± 0.47 | 0.06 ± 0.03 | 0.32 ± 0.11 | |
| Average ± SD | N158 NH3 loss, % | K328 Glycation, % | N327 NH3 loss, % | N317 Deamidation, % | N317 NH3 loss, % | M430 Oxidation, % | N436 Deamidation, % | Q421 Deamidation, % | |
|---|---|---|---|---|---|---|---|---|---|
| mAb | Non stressed | 0.04 ± 0.01 | 0.04 ± 0.01 | 0.33 ± 0.25 | 0.64 ± 0.27 | 0.05 ± 0.07 | 0.93 ± 9.64 | 0.29 ± 0.12 | 0.12 ± 0.04 |
| Heat stressed | 0.05 ± 0.01 | 0.04 ± 0.00 | 0.46 ± 0.07 | 1.18 ± 0.21 | 0.61 ± 0.19 | 2.03 ± 0.10 | 0.31 ± 0.10 | 0.39 ± 0.06 | |
| Photo stressed | 0.05 ± 0.01 | 0.04 ± 0.01 | 0.43 ± 0.26 | 0.71 ± 0.22 | 0.16 ± 0.13 | 15.61 ± 8.48 | 0.24 ± 0.07 | 0.09 ± 0.04 | |
| UPBH | Non stressed | 0.03 ± 0.01 | 0.76 ± 0.17 | 0.04 ± 0.01 | 0.69 ± 0.22 | 1.87 ± 0.25 | 0.66 ± 0.02 | 0.01 ± 0.01 | 0.02 ± 0.02 |
| Heat stress | 0.03 ± 0.00 | 2.24 ± 0.04 | 0.04 ± 0.00 | 1.87 ± 0.52 | 2.05 ± 0.45 | 10.71 ± 0.22 | 0.34 ± 0.29 | 0.11 ± 0.11 | |
| Photo stressed | 0.03 ± 0.01 | 0.89 ± 0.04 | 0.08 ± 0.00 | 0.95 ± 0.28 | 1.76 ± 0.33 | 68.56 ± 10.36 | 0.07 ± 0.05 | 0.02 ± 0.02 | |
| UPBH (Buffer exchanged) | Non stressed | 0.04 ± 0.01 | 0.49 ± 0.12 | 0.03 ± 0.01 | 0.23 ± 0.21 | 1.57 ± 0.22 | 1.60 ± 0.04 | 0.09 ± 0.08 | 0.03 ± 0.03 |
| Heat stress | 0.04 ± 0.01 | 0.38 ± 0.04 | 3.49 ± 2.13 | 2.20 ± 0.50 | 4.88 ± 0.87 | 19.95 ± 15.93 | 0.48 ± 0.54 | 0.11 ± 0.06 | |
| Photo stressed | 0.05 ± 0.02 | 0.57 ± 0.11 | 0.11 ± 0.01 | 0.49 ± 0.06 | 1.60 ± 0.33 | 97.32 ± 0.50 | 0.00 ± 0.00 | 0.00 ± 0.00 | |